2156158081 has 16 divisors (see below), whose sum is σ = 2692787328. Its totient is φ = 1677254400.

The previous prime is 2156158079. The next prime is 2156158099. The reversal of 2156158081 is 1808516512.

It is a cyclic number.

It is not a de Polignac number, because 2156158081 - 2¹ = 2156158079 is a prime.

It is a super-2 number, since 2×2156158081² = 9298035340523205122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2156158081.

It is not an unprimeable number, because it can be changed into a prime (2156153081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22051 + ... + 69271.

It is an arithmetic number, because the mean of its divisors is an integer number (168299208).

Almost surely, 2^2156158081 is an apocalyptic number.

It is an amenable number.

2156158081 is a deficient number, since it is larger than the sum of its proper divisors (536629247).

2156158081 is a wasteful number, since it uses less digits than its factorization.

2156158081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47832.

The product of its (nonzero) digits is 19200, while the sum is 37.

The square root of 2156158081 is about 46434.4492914474. The cubic root of 2156158081 is about 1291.8939551430.

The spelling of 2156158081 in words is "two billion, one hundred fifty-six million, one hundred fifty-eight thousand, eighty-one".